Any house from which materials it would not be built will not be comfortable if there was no proper attention during the construction of its insulation.
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It is necessary to insulate the roof, floor and walls. Only when all these x events are performed in the house will be comfortable and comfortable, even with minimal energy consumption. Thanks to the fairly easy weight of most modern roofs, it is possible to lay additional materials for warming the roof, without creating an additional load on the construction of the building.
It is worth noting that the roof insulation begins only after the built -in windows are installed and all related work is completed. Sometimes the roof insulation is decided to be done without replacing the roof, believing that it is in excellent condition. In addition, they plan to insulate the roof only from the inside. The most common material for warming roofs is glass wool, ecowata and stone cotton wool.
Can also use polystyrene foam, but rarely because it reduces ventilation characteristics due to the fact that it reduces vapor permeability. The thickness of the material for thermal insulation is chosen depending on what functional purpose of the room. The roof insulated according to all the rules will save on heating.